3.USB device wake-up (USBPW12, USBPW5-8)

Set this jumper to +5V to wake up the computer from S1 sleep mode (CPU stopped, DRAM refreshed, system running in low power mode) using the connected USB devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU, DRAM in slow refresh, power supply in reduced power mode).

 

 

USBPW12

 

 

1

2

2

3

 

+5V

+5VSB

 

(Default)

 

 

B75M-A

USBPW5-8

 

1

2

2

3

+5V +5VSB (Default)

B75M-A USB device wake up

•The USB device wake-up feature requires a power supply that can provide 500mA on the +5VSB lead for each USB port; otherwise, the system would not power up.

•The total current consumed must NOT exceed the power supply capability (+5VSB) whether under normal condition or in sleep mode.

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Chapter 1: Product introduction